JP2001139006A - Reel mechanism for film coil unwinding device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a coil tentering and centering adjustment mechanism for a coil unwinding device used particularly for a packaging machine for packaging a powder agent into a number of subdivision packs by using a continuous resin film for a mechanism used for the coil centering of an unwinding reel corresponding to the coil width when a soil-shaped film is unwound by the coil unwinding device. SOLUTION: A release mechanism is constituted of a hollow coil rotating shaft provided horizontally in front and driven rotatably from a device main body, a pair of reels of front and rear tapered pipe shape outer fitted slidably on the outer periphery of the rotating shaft and having tapered ends facing each other and engaged with the inner side end of a cylindrical pipe of a film coil, a reel width adjusting shaft inserted into the coil rotating shaft and having a right screw section and a left screw section formed dividedly on the front and rear of the outer periphery of the shaft, a pair of joining rings, front and rear, respectively screwed on the front and rear screw sections of the reel width adjusting shaft and a joining means running through a slot formed in the axial direction of the coil rotating shaft and joining respective reels with corresponding joining rings.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to centering of a coil of a rewinding reel corresponding to the width of a film coil when a coil is mounted on a sheet or film wound in a coil shape in a coil rewinding device. In particular, the present invention relates to a centering adjustment mechanism of a film coil rewinding device used in a packaging machine or the like for packaging a powder or the like in a long package on a long resin film.

[0002]

2. Description of the Related Art Film coil rewinding apparatuses are used in various fields utilizing long resin films or films (hereinafter simply referred to as films). In the field of powder packaging equipment, the film is rewound from a long thermoplastic resin film coil, the film is folded twice in the width direction, and the width is heat-sealed at regular intervals. Used to form multiple bags. A film packaging machine is used in which a number of connected bags are filled with a powder or the like in each bag, and then the upper edge is sealed, the opening is sealed, and the bag is packed in a number of separate packages. . In the dust packaging machine, a package is manufactured by filling each bag portion with a predetermined amount of dust, and a perforation is formed in a seal portion in a width direction to obtain a product. At the time of use, it can be cut off for each bag part from the perforation.

FIG. 7 shows an example of a dust packing machine. The film coil 90 is rewound by a film rewinding device 8 and is continuously transferred to a dust filling device 7 as a continuous film 9.
In the powder filling device 7, the film 9 is bent horizontally into a U-shaped trough while being transported horizontally. Form seals at regular intervals in the longitudinal direction,
Multiple bags are connected in series.

The inside of a double film divided by a number of width seal portions becomes a bag portion, and a number of bag portions are formed continuously in the longitudinal direction. The upper edge of the bag portion is open, and in the next metering and filling section 74, a fixed amount of powder is cut out by the chute 71 through the opening portion and filled in each bag portion. While the film 9 in which the powder material is loaded in each bag portion is continuously transferred, the upper edge portion of the bag portion is continuously heat-sealed by the upper edge sealing device 85 to form an upper edge seal portion. ,
The inside of the bag is sealed. The film 9 is further transported while being perforated in the width seal portion by the perforation cutting device 86, cut into a required number of bags, and each bag portion can be cut off at any time to become a product. .

[0005] A coil 90 of a long resin film used in such a dust packing machine is formed by winding a resin film 9 having a fixed width around a cylindrical tube 91 as a core material, usually a paper tube. The width of the paper tube and the width of the film are almost the same. As shown in FIG. 7, the coil rewinding device 8 used in the above-described device and the like is provided as a set of left and right, and the film coil 90 is mounted on the reel mechanism 1 of the rewinding device, and The film is drawn out of the film coil and supplied to the powder packaging machine while adjusting the speed with the upper tension roll 83. The other reel 1
In this method, the coil tube remaining after consuming the film is removed from the reel, a new film coil is mounted, and the apparatus is on standby. When switching the film coil from one reel to the other, the end of the previous film and the start of the new coil are connected by a pressure roll 82 so that a continuous film is supplied to the powder packaging machine. .

As an example of a reel mechanism 1 used in a conventional coil rewinding device, as shown in FIG. 8, a hollow coil shaft 10 is rotated around a fixed shaft P horizontally projecting from a vertical substrate 81. A pair of tapered tubular reels 3a, 3b are extrapolated around the coil shaft 10 and the tapered surfaces of both reels 3a, 3b are connected to the cylindrical tube 9 of the film coil 90.
1. Normally, both ends of the paper tube are sandwiched and fixed. The rear reel 3b is fixed to the rear part of the coil shaft 10 with a set screw, and the front reel 3a is fixed to the screw part on the outer periphery of the coil shaft with a one-touch screw.
a is made detachable. Further, an adjustment screw member U screwed to the screw N at the tip of the fixed shaft is provided so as to be rotatably connected to the front end of the coil shaft 10 so as not to move back and forth. Axis 10
Moves forward and backward, and both the front reel 3a and the rear reel 3b move back and forth. This facilitates replacement of the film coil 90 and subsequent fixing of the film coil to the coil shaft by the front and rear reels 3a and 3b.

[0007] This coil rewinding device, when replacing the film coil with a different film width, the rear reel 3
The set screw (b) must be loosened and fixed again with the set screw according to the reel width.

[0008]

Although the above-mentioned coil rewinding apparatus can cope with a change in the film width, the automatic dust packing machine described above switches to a film coil having a different film width, and is used for filling the powder. When the operation is continued, the previous film and the new film are likely to be shifted from each other at the center position of the film when the rear reel 3b is fixed. A detachment occurs, and the ear is likely to be displaced or deformed. The reason for this is that the center position of the film changes as the film width changes, because the conventional device uses a fixed rear reel.

As described above, in the coil rewinding device, it is necessary that the centers of both coils in the width direction coincide with each other. Therefore, when a new coil is mounted on a reel, a centering operation is required. Becomes

As a mechanism for adjusting the center position of the film,
The present applicant has proposed, in another application (Japanese Patent Application No. 10-262969), an apparatus for adjusting the centering of a film by a mechanism for moving a vertical axis supporting a coil axis or a fixed axis thereof back and forth. However, this centering mechanism did not respond to changes in film width.

SUMMARY OF THE INVENTION The present invention has been made in view of the above problems, and has as its object to provide a reel width adjusting mechanism in which the center position of a film mounted on a reel does not always change even when the film coil width is changed. . The present invention further provides:
An object of the present invention is to easily and quickly fix a film coil to a reel of a coil rewinding device while adjusting a reel width according to a film coil width. In the present invention, the reel mechanism further facilitates centering of the reel itself for centering the coil.

[0012]

The reel mechanism according to the present invention comprises:
A front and rear tapered reel is provided on the outer periphery of the hollow coil rotating shaft, and a reel width adjusting shaft is provided which is inserted into the coil rotating shaft and both ends of which are rotatably supported. The right-hand thread and the left-hand thread are engraved,
It is characterized in that a pair of front and rear coupling rings respectively screwed to the front and rear thread portions of the reel width adjusting shaft are coupled to the front and rear tapered reels by providing coupling means.

This reel mechanism comprises a pair of front and rear coupling rings which are respectively screwed into front and rear thread portions of a reel width adjusting shaft, and a pair of reels which penetrate through an elongated hole provided in a coil rotating shaft in an axial direction. Including a coupling means for coupling with a corresponding coupling ring, adjusting the distance between the front and rear reels by a manual rotation operation of the reel width adjusting shaft, and centering the cylindrical tube of the film coil held between the reels. Things.

The above-mentioned connecting means includes a cam follower projecting from the front connecting ring, penetrating an elongated hole of the coil rotating shaft and projecting to the outer periphery of the coil rotating shaft, and a front surface of the cam follower is engaged with the cam follower as a cam surface. And a ring cam whose back surface is in contact with the base of the front reel and enables the front reel to be pushed in the rear reel direction.
The ring cam causes the front reel to hold the tubular tube of the film coil between the front reel and the rear reel.

Furthermore, in the reel mechanism of the present invention, the front reel is provided with an inner groove through which the coupling means passes through on the inner peripheral side which is externally inserted into the coil rotating shaft. Includes free reel mechanism. Further, the ring cam is provided with an inner groove through which the coupling means passes through on the inner peripheral surface side in contact with the coil rotating shaft, and the ring cam is detachable from the coil rotating shaft.

Further, in the present invention, it is preferable that centering adjustment means for adjusting the longitudinal movement of the reel width adjustment axis with respect to the coil rotation axis is provided so that the coil center position of the reel can be adjusted.

[0017]

BEST MODE FOR CARRYING OUT THE INVENTION A reel mechanism according to the present invention comprises a hollow coil rotating shaft which is rotatably driven at one end side from an appropriate member of the apparatus. A pair of front and rear reels are slidably inserted outside. The front and rear reels are used as reels in such a manner that the end portions of the reels are opposed to each other and engage with both inner ends of a cylindrical tube (core tube for winding a film into a coil) of a film coil.

The above-mentioned one end (that is, the drive side end) of the coil rotating shaft is coupled to an electromagnetic brake fixed to the device via gears and joints, so that the tension of the coil rotating shaft with respect to the film is controlled. Is done. The pair of reels support the film coil with the film coil tube interposed therebetween, and the film is released from the coil while maintaining a constant tension.

A reel width adjusting shaft is inserted inside the coil rotating shaft, and both ends thereof are rotatably supported in the coil rotating shaft. The reel width adjusting shaft is provided with a threaded portion divided longitudinally front and rear, and the front threaded portion is provided with a thread cut in the opposite direction to the rear threaded portion (that is, a right-hand thread and a left-hand thread). I have. A coupling ring is screwed into each of the right-hand thread portion and the left-hand thread portion, and a pair of front and rear coupling rings are coupled to the front and rear reels by providing coupling means. When the reel width adjustment shaft is rotated, both right-hand and left-hand thread parts are rotated, and the two coupling rings screwed into the two thread parts move closer to or away from each other in the opposite direction, and are coupled respectively. The distance between the front and rear reels is adjusted by narrowing or widening the distance between the front and rear reels, thereby adjusting the distance between the front and rear reels corresponding to the width of the film coil, particularly the length of the tube of the film coil. be able to. In this manner, the front-rear distance of the front and rear reels is adjusted by the manual rotation operation of the reel width adjustment shaft, and the reel width adjustment corresponding to the cylindrical tube of the film coil is performed.

In this embodiment, the connecting means for connecting the connecting ring and the reel is provided so that a long hole penetrates the outside and inside of the coil rotating shaft along the longitudinal direction of the hollow coil rotating shaft. The coupling means is arranged to couple the coupling ring and the reel through the elongated hole, and when the coupling ring is moved back and forth along the elongated hole, the reel can also be moved back and forth. The coil rotation axis may be rectangular or other polygonal shape, but even when the coil rotation axis is cylindrical and the outer circumference of the coupling ring is circular, the reel width adjustment axis is rotated. At this time, the coupling means coupled to the coupling ring is constrained by the elongated hole in the direction of rotation, and can be moved back and forth along the elongated hole.

For this embodiment, the front reel is
For each exchange of the film coil, it is necessary to be able to pull out from the coil rotating shaft. For this purpose, the front reel is made separable from the coupling ring coupled thereto or the coupling means. You.

For this purpose, the coupling means preferably includes a cam follower projecting from the front coupling ring, penetrating through a long hole of the coil rotating shaft and projecting outside the coil rotating shaft, and engaging with the cam follower. And a ring cam provided with a cam surface that comes into contact with the front reel side in a pressable manner.

Further, it is preferable that an inner groove through which the protruding cam follower is inserted is provided in the ring cam and the front reel on the inner peripheral side so as to penetrate in the axial direction.
The front reel and its ring cam can be pulled out from the coil rotating shaft by passing the cam follower through the inner groove, and can be inserted again. After extracting the front reel and its ring cam, extracting the used coil and inserting a new film coil,
Further, by inserting the above-mentioned front reel and its ring cam, the film coil can be exchanged.

The ring cam has its rear surface in contact with the front surface of the front reel, is externally coaxially inserted with the coil rotating shaft, and has a cam surface formed so that the cam follower contacts the ring front surface of the ring cam. The ring cam is formed so that the cam surface starts from the inner groove and ends at a part of the circumference of the ring, but when rotated around the axis of the ring cam, the contact position of the cam follower moves away from the inner groove. , So that the thickness is increased in the axial direction. Then, the position of the cam follower as the coupling means on the coil rotation axis is determined, and the ring cam is inserted into the inner groove, and the ring cam is manually rotated. Since the reel is pressed rearward, both ends of the tubular tube of the film coil are tightened by the front and rear reels, so that the film coil can be fixed to the reel.

Embodiments of the present invention include those in which the reel mechanism has a coil centering mechanism. Such a centering mechanism is provided with a longitudinal movement adjusting means between the reel width adjusting shaft and the coil rotating shaft so that the entire reel width adjusting shaft can be moved forward and backward with respect to the coil rotating shaft, and thereby, The position of the front and rear reels as a whole can be adjusted back and forth with respect to the coil rotation axis, and the coil center position with respect to the device is adjusted.

The front-rear movement adjusting means is such that the reel width adjusting shaft is connected at its front end to a front-rear position adjusting screw screwed at the front end of the coil rotating shaft, and the turning operation of the front-rear position adjusting screw is performed. In this case, it is possible to adopt a device which moves the reel width adjusting shaft back and forth to adjust the coil center position.

[0027]

1 to 3 show an embodiment of a reel mechanism 1 according to the present invention. In this embodiment, the film coil rewinding device itself has another coil centering mechanism. Can be moved back and forth with respect to the apparatus body.

In FIG. 1, the reel mechanism 1 is provided with a vertical member 81 of the film coil rewinding device which is movable back and forth with respect to a fixed base 80 of the film coil rewinding device. Are rotatably penetrated through bearing members at both ends, and an electromagnetic brake M for controlling the coil rotating shaft 10 is fixed to the rear side of the vertical member 81. Gear 1 on moving shaft 10
8 and 181, and rotationally drives the tension control of the coil rotating shaft 10 with respect to the film.

The coil rotating shaft 10 protrudes horizontally toward the front of the vertical member 81, and a pair of tapered tubular reels 3a and 3b are externally inserted on the outer periphery, and a film coil is inserted between the reels 3a and 3b. The tips are opposed to each other so as to be sandwiched. Further, the hollow coil rotating shaft 10 includes
Elongated holes 11a and 11b parallel to the axial direction are provided.
In this example, two long holes 11a and 11b are divided in the front-rear direction, and two holes are provided linearly in the axial direction and two in the front and rear, respectively, symmetrically with respect to the axis of rotation of the coil.

The coil rotating shaft 10 is hollow or tubular, and the reel width adjusting shaft 2 is inserted therein. Both ends of the coil rotating shaft 10 are connected to the inner end of the coil rotating shaft 10 via bearings 28 and 29. It is rotatably supported and is fixed immovably forward and backward. Further, the screw widths 21a, 2a,
1b is engraved, and the front and rear thread portions 21a and 21b are cut into opposite threads so that one is a right-hand thread and the other is a left-hand thread.

The screw portions 21a, 2a and 2a before and after the reel width adjusting shaft
1b are screwed with coupling rings 4a, 4b provided with screw holes 40, respectively, and the front and rear coupling rings 4a, 4b
Are connected to corresponding tapered front and rear reels 3a, 3b by connecting means. The coupling means penetrates the elongated holes 11a and 11b formed in the coil rotation shaft 10 and couples the ring member and the reel. Since the screw portions 21a and 21b before and after the reel width adjusting shaft 2 are opposite screws, by rotating the reel width adjusting shaft 2,
The coupling rings 4a and 4b move in opposite directions, and accordingly, the distance between the front and rear reels 3a and 3b can be freely adjusted to be narrow or wide.

For turning the reel width adjusting shaft 2, a knob 25 fixed to the tip of the reel width adjusting shaft 2 is provided at the end of the coil turning shaft 10, and the turning operation of the knob 25 is performed. it can. In this case, the outer diameter of the knob is smaller than the outer diameter of the coil rotation shaft 10, so that the knob does not hinder removal or insertion of the front reel 3a from the coil rotation shaft 10.

As the coupling means in this embodiment, a coupling block 42 slidably fitted in the elongated hole 11b on the rear side of the coil rotating shaft can be used as the coupling means at the rear. The block 42 and the rear connection ring 4b are fixed by bolting.

The front connecting means has a special structure to make the front reel 3a detachable. That is, as described above, the coupling means at the front part is the reel width adjusting shaft 2.
The cam follower 41 is protruded from the outer periphery of the front coupling ring 4a screwed to the outer peripheral side of the coil rotating shaft 10 through the elongated hole 11a on the front side and the front follower 3a is provided on the front reel 3a side. A separate ring cam 5 is provided in contact with the reel 3a, and the cam follower 41 contacts the cam surface 51 of the ring cam 5, the ring cam 5 is fixed, and presses the front reel 3a.

The ring cam 5 is externally inserted into the coil rotating shaft 10 coaxially with the tapered tubular front reel 3a. The inner peripheral surfaces of the ring cam 5 and the front reel 3a are slidable on the coil rotation shaft. The ring cam 5 and the front reel 3a have inner grooves 55 and 31 in the axial direction on the inner peripheral surface side thereof, through which the cam followers 41 can be inserted. Therefore, the ring cam 5 and the front reel 3a are
The coil rotating shaft 1 is moved so that the cam followers 41 projecting from the coil rotating shaft 10 pass through the respective grooves 55 and 31.
It can be pulled out from 0, and conversely, it can be inserted into the coil rotating shaft 10 and arranged on the rear coil rotating shaft from the cam follower 41.

FIG. 4 is a partially cutaway perspective view of the reel mechanism 1, and FIG. 5A is a perspective view of an example of the ring cam 5. In this example, the ring cam 5 is attached to the inner peripheral surface of the ring. On the side of the cam surface 5, two inner grooves 55 are provided at opposing positions.
0 is formed on the front side of the ring of the ring cam 5 at an angle of 60 ° from the center of the ring from the inner groove 55 with an inclined surface. The cam surface 50 is provided with the inner groove 5 of the ring cam.
In the position starting from 5, the lowest thickness of the ring front surface 51 (in other words, the thickness of the ring is the smallest, gradually increases along the cam surface 50, and comes into contact with the plane of the ring front surface 51 at a position of about 60 °. In addition, the ring thickness is the largest.

In order to rotate the ring cam 5, a pair of rod-shaped handles 56, 56 are screwed and fixed at opposing positions on the outer periphery 53 of the ring cam, and the handles 56, 56 are inclined forward. As such, it is protruding.

Referring to FIGS. 4 and 5 (B, C), the arrangement relationship between the ring cam 5 of the reel mechanism and the cam follower 41 is seen. The cam follower 41 protruding from the front coupling ring 4a has: A rotatable cam follower 41 is used, and the cam follower 41 is a long hole 11a of the coil rotating shaft 10.
(Not shown in FIG. 4). In this embodiment, the rotatable cam follower 41 is used to reduce the frictional resistance between the cam follower 41 and the cam surface 50.

On the other hand, the ring cam 5 and the front reel 3a are externally inserted into the coil rotating shaft 10 so that the cam followers 41 pass through the inner grooves 55 and 31, and the back surface of the ring cam is on the base side of the front reel 3a. It is arranged so that it may contact. FIG. 5B shows a positional relationship when the cam follower 41 passes through the inner grooves 55 and 31. Cam follower 41
The cam surface 50 immediately after exiting from the inner groove 55 is located at the lowest position, and the ring cam 5 further rotates from the position of the inner groove 55 with respect to the cam follower 41, and in FIG. It is fixed at an appropriate position so as to contact the surface 50. The ring cam 5 is rotated by a large couple by a rotation operation of the handle, and as the cam follower 41 rotates on the cam surface 50 from the inner groove position, the ring cam 5 moves the front reel 3a rearward, that is, the rear reel. 3b
Side, whereby the coil body can be sandwiched between the tapered surfaces 30 of the front reel 3a and the rear reel 3b. FIG. 5C shows that the ring cam is a cam follower 4.
1 shows a state in which the camshaft 50 has been rotated the most so that it comes to a high position on the cam surface 50.

FIGS. 1 and 3 show that the outer edge of the other rear reel 3b has a pointed protruding member 37 toward the front, that is, toward the tubular tube 91 of the film coil (see FIG. 3). An appropriate number is projected and fixed, and when the tube 91 of the film coil is tightened between the front reel 3a and the rear reel 3b by the operation of the ring cam 5,
The projecting member 37 is made to pierce the end face of the cylindrical tube 91, whereby the rotation of the coil rotating shaft 10 can be transmitted to the film coil 90 and caused to rotate without causing slippage. Usually, a paper tube is used as the tube tube 91, and engagement of the projection member with the paper tube can be ensured. However, even if the cylindrical tube is made of plastic, the protruding member can be used similarly.

The outer peripheral surface 53 of the ring cam 5 is covered by the outer edge of the base of the front reel 3a (a part of the outer edge is cut off in the turning range of the protruding handle).
Further, a reel cover 39 is attached to the base side of the front reel 3a from the front (see FIGS. 1 to 3), and the reel cover 39 covers the cam follower 41 together with the ring cam 5. The reel cover 39 has a center hole to be inserted into the coil rotating shaft 10, and the front cover 3 a
Bolted to the outer edge of the base. Thereby, the reel cover 39 unitizes the ring cam 5 with the front reel 3a, and detachment and reattachment of the front reel 3a becomes convenient.

Further, when the front and rear reels 3a and 3b are spread, the cam follower 41 of the front reel 3a is moved forward by rotation of the reel width adjusting shaft 2 so that the cam follower 41 The front reel 3a can be moved to the front side by contacting the inner surface. FIG. 3 shows an aspect of the reel mechanism when the front and rear reels 3a and 3b are greatly widened. The operation of the knob alone is performed to adjust the distance between the front and rear reels 3a and 3b in accordance with the coil width of the film to be used. Can be adjusted freely.

FIG. 6 shows an example in which a coil centering mechanism is provided in the reel mechanism of the above embodiment. In FIG. 6, the vertical member 81 is supported via a bearing so as to rotatably penetrate the hollow coil rotating shaft 10.
Is fixed to the fixing base 80 by an angle-shaped fixing tool 811.
It is fixed to. In this case, another coil centering mechanism is not required for the film coil rewinding device, and a reel mechanism may be fixed to the device main body.

The rear end portion 23 of the reel width adjusting shaft 2 is supported by a bearing member 29 so that the rear end portion 23 is rotatable inside the coil rotating shaft 10 and, in this case, can be moved back and forth. The front end 26 of the reel width adjusting shaft 2 is fixed inside the coil rotating shaft 10 via a centering adjusting screw member 60. A bearing 281 that supports the front end of the reel width adjusting shaft 2 is fixed inside the centering adjusting screw member 6, and the reel width adjusting shaft 2 cannot move forward and backward with respect to the centering adjusting screw member 6. It is pivoted.

The centering adjustment screw member 6 has a screw 60 engraved on the outer peripheral surface thereof and is screwed with a screw 121 engraved on the inner surface of the end of the coil rotating shaft 10. The movement allows the reel width adjustment shaft 2 to move back and forth with respect to the coil rotation shaft 10. Centering adjustment screw member 6
The centering adjustment screw member 6 is provided with a centering operation knob 62 outside the front end of the coil rotating shaft. The front end of the reel width adjustment shaft 2 further extends forward through the centering adjustment screw member, and the above-described width adjustment knob 25 is attached thereto.

The centering adjustment of the film coil is performed by rotating the centering operation knob 62 so that the centering adjusting screw member 6 is screwed to the coil rotating shaft 10 with respect to the coil rotating shaft. The reel width adjusting shaft 2 can also move back and forth correspondingly, so that a pair of front and rear reels 3a, 3
b can be integrally moved back and forth without changing the reel interval. In this manner, the center position of the film coil in the width direction can be adjusted with respect to the device, and the center of the coil can always be centered at a constant position with respect to the device even if the coil width is changed. In this way, even when the coil width is changed, the reel interval between the pair of front and rear reels 3a and 3b can be reduced without changing the center position in the width direction of the film coil 90 by rotating the knob 25 for width adjustment. Wide adjustment can be performed, and the reels 3a and 3b can appropriately hold the cylindrical tube of the film coil and perform the rewinding operation appropriately.

[Brief description of the drawings]

FIG. 1 is a longitudinal sectional view of a reel mechanism of a film coil rewinding device according to an embodiment of the present invention.

FIG. 2 shows an upper surface of a reel mechanism of the film coil rewinding device shown in FIG.

FIG. 3 is a longitudinal sectional view of a reel mechanism of the film coil rewinding device according to the embodiment of the present invention, showing the reel mechanism in a state where front and rear reels are expanded.

FIG. 4 is a partially cutaway perspective view of a reel mechanism of the film coil rewinding device according to the embodiment of the present invention.

FIG. 5 shows a perspective view (A) of a ring cam used in the reel mechanism according to the embodiment of the present invention, and sectional views (B, C) showing the mechanism of the ring cam.

FIG. 6 is a longitudinal sectional view of a reel mechanism of a film coil rewinding device according to another embodiment of the present invention.

FIG. 7 shows a front view of an automatic powder packaging machine provided with a film coil rewinding device.

FIG. 8 is a cross-sectional view of a reel mechanism of a conventional film coil rewinding device used in an automatic dust packaging machine.

[Explanation of symbols]

 Reference Signs List 1 reel mechanism 10 coil rotating shaft 11a long hole 11b long hole 2 reel width adjusting shaft 25 knob 3a front reel 3b rear reel 31 inner groove 41 cam follower 5 ring cam 50 cam surface 55 inner groove 90 film coil 9 film

Claims (8)

[Claims] 1. A reel mechanism for adjusting a coil reel of a film coil rewinding device according to a coil width, comprising: a hollow coil rotating shaft laterally provided forward so as to be rotatable from an apparatus main body; A pair of front and rear tapered tubular reels which are slidably mounted on the outer periphery of the shaft and whose tapered end portions are opposed to each other and engage with the inner end of the tubular tube of the film coil; The shaft is rotatably supported at both ends and is divided into front and rear parts on the outer circumference of the shaft, and the right and left threads are engraved. A pair of front and rear coupling rings, and coupling means for penetrating an elongated hole provided in the coil rotating shaft in the axial direction and coupling each reel to a corresponding coupling ring. It can be moved back and forth by manual rotation. Adjust the Le distance between the reel mechanism of the film coil unwinding device characterized by performing centering of the cylindrical tube of the film coil which is held on the reel. 2. A cam follower projecting from a coupling ring on the front side, penetrating an elongated hole of the coil rotating shaft and projecting to the outer periphery of the coil rotating shaft, and a front surface of the cam follower is engaged with the cam follower as a cam surface. And a rear surface of which is in contact with the base of the front reel to allow the front reel to be pushed toward the rear reel. 2. The reel mechanism according to claim 1, wherein the tubular tube of the film coil is sandwiched between the reel mechanisms. 3. The front reel according to claim 1, wherein an inner groove is provided on an inner peripheral side of the outer periphery of the coil rotating shaft to allow the coupling means to pass therethrough so as to be detachable from the coil rotating shaft. The reel mechanism according to claim 1 or 2, wherein 4. The ring cam is provided with an inner groove through which the coupling means is inserted and passed on an inner peripheral side which is inserted outside the coil rotating shaft, so that the ring cam is detachable from the coil rotating shaft. The reel mechanism according to claim 3, wherein: 5. The ring cam according to claim 1, wherein the cam surface has a lowest cam surface position starting from an opening of the inner groove opening in the front surface of the ring, and a slope rising in the ring rotation direction is formed along the front surface of the ring. The reel mechanism according to claim 4, wherein the reel mechanism is formed. 6. The apparatus according to claim 1, further comprising a centering adjusting means for adjusting the reel width adjusting shaft to move back and forth with respect to the coil rotating shaft so that the coil center position of the reel can be adjusted. Reel mechanism. 7. A centering adjusting means is provided with a front / rear position adjusting screw which is screwed with a front end of the coil rotating shaft, and the reel width adjusting shaft is rotatable with the front / rear position adjusting screw so as not to move forward and backward. 7. The reel mechanism according to claim 6, wherein the coil center position of the reel can be adjusted by turning the front / rear position adjusting screw. 8. The reel mechanism according to claim 1, wherein the film coil rewinding device is a rewinding device used in a powder packaging machine.